Appabattjs fob bepaibing ftjbnace-linings



C. L. MDWRY AND C. L. DUDLEY. APPARATUS FOR REPAIRING FURNACE LININGS.

APPLICATION FILED APR.6. 1920.

1,363,610. Patented Dec. 28,1920.

2 SHEETS-SHEET l- FIGJ- NNNNNN OR C. L. MOWRY AND C. L. DUDLEY.

' APPARATUS FOR REPAIRING FURNACE LININGS.

APPLICATION FILED APR. 6, 1920.

mm \t R 0 m m: M mm b 4 4 w 7 H I M m Q A? m lwm6 P Q 647/ UNITED STATESPATENT OFFICE.

CHARLES L. Mower AND CLARENCE L. DUDLEY, or woonLAwN, PENNSYLVANIA,

APPARATUS FOR REPAIRING FURNACE-LININGS.

Specification of Letters Patent.

Patented Dec. 28, 1920.

To (422 whom it may concern.

Be it known that we, Ciranmis L. Mower and CLARnnor. L. Deters, residingat 00dlawn, in the county of Beaver and State of Pennsylvania, bothcitizens of the United States, have invented or discovered certain newand useful Improvements in rlipparatus for Repairing FurnaceLinings, ofwhich improvements the following is a specific tion. I

Our invention has to do with means for impelling broken material inbulk; we have developed the invention as an adjunct to an open-hearthfurnace for smelting steel, but manifestly it is not limited to suchspecific use.

In the operation of open-hearth furnaces, and particularly those ofbasic type, the reactions Which occur involve the gradual eating away ofthe furnace lining. Although the lining or hearth material of thefurnace is carefully measured and spread before the furnace is chargedand heated, still this initial body of material is often, in theprogress of the operation, so far eaten away as to threaten destructionof the more permanent portions of the furnace structure, and impairmentof the quality of the metal under treatment. The chemical attack of themolten charge upon the material which composes the lining is mostviolent along the margin of the bath or pool of molten metal. In thecourse of operation as commonly practised it is requisite for men to beat all times ready, and, when the consumption of the basic material hasat any point ad vanced too far, to apply new quantities of material atthe danger point. vSuch application is made by throwing the materialfrom a shovel through the furnace door to the proper point along themargin of the pool of molten metal which forms the bath or furnacecharge. And, since furnaces of this sort measure as much as fourteenfeet across, there is required of the men tending the furnace not only aconsiderable degree of strength and skill, but also, in view of theextremely high temperature of the furnace, great physical endurance aswell.

Mechanical conveyers of one sort and another have heretofore beenproposed, to take the place of these skilled workmen; but, so far as weknow, none of them has met with any enduring or extended success.

We have devised a mechanical conveyer and carried it to the point ofsuccess, and in its novel features of structure our present inventionresides.

In the accompanying drawings Figure I is a view in vertical andtransverse section through an open-hcartl'i furnace, in the line of doorand spout, showing in side elevation conveyer apparatus of ourinvention; Fig.

I is a view in longitudinal and vertical section and to larger scale ofa portion of the conveyer apparatus shown in Fig. I; and Fig. III is aview in horizontal section, on the plane indicated by the line IIL-III,Fig. II. Our conveyer is a gun, in the sense that 1t shoots the materialthrough a tube or barrel to the point where application is desired. Themotive power is fluid under pressure; it might for example be steam, butis preferably compressed air.

An open-hearth furnace is indicated at A. A hopper 1 is suitably mountedto be conveyed to position opposite the furnace door Any convenientmethod of support may be resorted to; we show the hopper carried in aframe 2 which is movable upon rollers 3 across the floor adjacent thefurnace.

The gun itself consists in a long tube or barrel 4, water-jacketed asindicated at 5 in well-known manner through so much of its extent as inoperation is exposed to the intense heat of the furnace. Itis ofsufficient length to extend through the furnace door and across thefurnace chamber to a point so related to the margin of the pool of metalwhich within the chamber constitutes the furnace charge that the streamof material ejected from the muzzle of the gun will fall upon the bankof the pool at or just above the margin of metal, where erosion isgreatest.

This gun is carried by the hopper 1, and is through a lateralpipe-connection 7 pivoted or swiveled, preferably by the universal jointindicated at 6 to the pipe 8 which constitutes a spout or prolongationof the throat of the hopper. The support constitutes an open passageway,through which material from the hopper descends by gravity and entersthe bore of the gun. This is fully and clearly indicated in Fig. II. Ashutter 9 may be provided, to cut off at will or to control theeffective area of the passageway (of. Fig. III).

Into the bore of the gun, and in the direction toward its delivery endor muzzle, and preferably at a point adjacent the en trance of materialfrom hopper l. is Q 9 i jected through a nozzle 10 a jet of nuic,conveniently air under relatively high sure-100 pounds to the squareinch, or thereabout. This nozzle is i l th:or h a pipe which enters thebore oi tl from the rear, as indicated in w Rearward of nozzle 10, o thelength the gun barre terial enters from hopper l, is L breach or opening11, of relatively large through which there is free how of air the boreof the gun.

The rear end of the gun, rearward point of support, is of convenien itmay be counterweighted, as ii i 12, so that the whole structure is wellbaianced in its support from 10 t3, and a handle 13 may be provided, orconve in turning and tipping, The tion 14-, and the water co 16 for thewater jacket, ti cated. A lever 17 is provided, with a handle, formanipulating shutter 9.

Operation is simple. The apps brought to position, with the unit; gunextending through the door of nace a suilicieut distance (to he d byexperience), is indicated in i will be understood that under serviceditions a pool of molten meta will be res ing on the hearth ot' the fitime of introduction water ing in the water jacket of c passageway fromthe hopper l. l open, the compressed air supply is, o trol valve (notshown) adni "d connection i l to blow in a nozzle 10. This inblown jadditional quantities oi? air ing 11, and the result is a stream of airsweeping through the gun and across the point of -5 material from hopperl-which i I, has been said, descei'lds by gravity taro passageway 8, 7into the gun bore. stream of air sweeping forward carries it this solidmaterial and delivers V stream from the muzzle of the gun. be understoodthat in a proper control 0 i air supply, the slide or shutter 92, theballand-socket joint 6 with the provision for manual swinging found inhan lie 13, there are all the factors necessary to direct stream ofmaterial and deliver it to the desired point through a considerable theframe ill aitord is, in the remaining adjus sul client flexibility to bpoint desired on the i shore ti o p el of metal, and shoveling wilsu'liice tor repair of the pro ate shore, liowit will be understood thathe possibili, ce there, and the a urams may be made easy of movementoverwide as may be desired shoving atlorded iii the drawings is en mplary:in. the B'l'lSll'lIlg cle is we define ishszt is of ti essence oi therest, variation within the Knowledge Oil the engineer is permissible andexpected We claim as our invention:

l gun for impelling broken material bulk, consisting of a barrel, apassageway for material opening transversely into said 'el, fluid jetdirected longitudinally of in barrel from a point adjacent the open ngof said passageway, and an air induc- 101 port opening to said barrelrearward oit o ening of said passageway, substanas described. lnapparatus for impelling broken ina-- terial in bulk, the combination ofa frame, a hopp r car ied in said fram and a gun plvotally carried bysaid hopper wl A gun said hopper opens, substautuilly s 8 In apparatusfor inpelling lrolren material in btlr, the combination of a frame, ahopper carried in said i aine, a gun caried by said hopper by auniversal joint, a passageway -from said hopper to the barrel at saidgun, a for -rardly directed 'liluid nozarranged in the barrel 0;? saidgun, and port in the barrel oi? said gun rearward of the point wheresaid passageway enters said gun barrel, substantially as de scribed Intestimony whereof: we have hereunto set our hands.

CHARLES It lchlllVltYu CLARENCE DUDLEY.

lt itnesses 'W. R. KARBAN,

T. MOONEY,

